The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2017
Filed:
May. 05, 2015
Skyworks Solutions, Inc., Woburn, MA (US);
Joshua Haeseok Cho, Irvine, CA (US);
Yunyoung Choi, Irvine, CA (US);
Bipul Agarwal, Irvine, CA (US);
SKYWORKS SOLUTIONS, INC., Woburn, MA (US);
Abstract
Apparatus and methods for digital step attenuators are provided herein. In certain configurations, a digital step attenuator (DSA) includes a plurality of DSA stages arranged in a cascade between an input terminal and an output terminal. Each of the DSA stages can be operated in an attenuation mode or in a bypass mode. The DSA further includes an attenuation control circuit, which can be used to control the modes of operation of the DSA stages. The attenuation control circuit can be used to operate the DSA over a plurality of attenuation steps, which can be digitally selectable. To provide low phase shift across the range of attenuation steps, a DSA stage can include one or more phase compensation capacitors used to provide low phase shift and to compensate for a phase difference between the DSA stage operating in the bypass mode and in the attenuation mode.